Grain-cleaner



(No Model.)

H. BRYAN.

GRAIN CLEANER.

Patented Mar. 19, 1889.

rricn.

HENRY BRYAN, OF MODESTO, CALIFORNIA.

GRAIN-CLEAN ER.

SPECIFICATION forming part of Letters Patent No. 399,827, dated March 19, 1889.

Application filed July 2'7, 1888. serial No. 281,242- (No model.)

To all whom it may concern.-

Be it known that I, HENRY BRYAN, of Mo desto, Stanislaus county, State of California,

have invented an Improvement in Grain- Cleaners; and I hereby declare the following to be a full, c1ear,a11d exact description of the same.

My invention relates to the class of graincleaners in which oppositely-vibrating screencarrying shoes are employed; and my invention consists in a novel mechanism for imparting to said shoes the necessary vibrating or quivering motion.

The obj eot of my invention is to provide a mechanism for this purpose which will give to the shoes the proper rapidity of mot-ion without having to speed up the driving machinery, and at the same time will reduce .the friction and Wear on all the parts.

Referring to the accompanying drawings for a more complete explanation of my invention, Figure 1 is an end elevation of a graincleaner, showing the application of my improvement. Fig. 2 is an enlarged view of same. Fig. 3 shows the returning-springs C on the opposite ends of the shoes.

A is the frame of the grain-cleaner, having mounted within it the lower shoe, B, and the upper shoe, B, said shoes having the usual springs, O, for returning them. Secured firmly to the post a of the machine are bearings D, in which is mounted a vertical rock-shaft, E, having a crank-arm, e, from which a connecting-rod, F, extends to an eccentric or crank, G, whereby a rocking motion is imparted to the shaft.

On the lower end of the shaft is a rocker, H, having its convex side toward the shoe B and operating against ablock, b, on said shoe. On the upper end of the shaft is a rocker, II, having its concave side toward the shoe B and operating within a bracket, 5, secured to the shoe.

The operation of the device is obvious. By the rotation of the eccentric the shaft E is rocked, and through its reversed end rockers a vibrating opposite motion is given to each shoe. By reason of the rockers it will be seen that each revolution of the eccentric imparts four movements to the shoes, so that without having to speed up the eccentric shaft the necessary speed of the vibration or quivering motion is imparted to the shoes. The rockers being curved, as shown, reduces the friction to a minimum, so that the whole device works easily and with the exercise of but small power.

Having thus describe d my invention, what I claim as new, and desire to secure by Letters Patent, is p 1. In a grain-cleaner, the independentlyvibrating shoes, one being provided with the bracket 7), in combination with the rockshaft, the reversely-curved rockers on the shaft and working against the shoes, and the springs, substantially as herein described.

2. In a grain-cleaner, the shoes B B and the springs for returning them, in combination with a stationary rock-shaft, a curved rocker on the lower end of the shaft bearing against the lower shoe, the mopositely-curved rocker on the upper end of the shaft hearing within a bracket upon the upper shoe, the rotary eccentric, the crank on the rockshaft, and the connecting-link, all arranged substantially as herein described.

In witness whereof I have hereunto set my hand.

HENRY BRYAN.

Witnesses:

H. NOURSE, H. 0. LEE. 

